TWI325247B - Asymmetric mode of operation in multi-carrier communication systems - Google Patents

Description

丄(2) 247 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates generally to wireless communication systems, and in particular to multi-carrier communication systems that provide asymmetric modes of operation. [Prior Art] • The _ communication system can provide communication between several base stations and access terminals. The forward link or downlink refers to the φ transmission from a base station to an access terminal. The reverse link or uplink refers to the transmission from an access terminal to a base station. "Whether the access terminal is active and the access terminal is in soft handoff, each The access terminal can communicate with one or more base stations on the forward and reverse links at a given time. • Wireless communication systems are widely used to provide various types of communication (eg voice, data, etc.) to multiple users. Such systems may be based on code division multi-directional proximity (DMA) 77-times approach (TDMA), frequency division multi-directional proximity (FDMa) or other multi-directional proximity techniques. CDMA systems provide certain desirable features, including increased system capacity. A CDMA system can be designed to implement one or more

Standards such as IS-95, cdma2000, IS-856, W-CDMA, TD-SCDMA, and other standards. In response to the growing demand for multimedia services and high-speed data, multi-carrier modulation has been proposed in wireless communication systems. There is still a challenge, for example, to provide an efficient and robust multi-carrier communication system. SUMMARY OF THE INVENTION The present invention discloses an asymmetric operation mode for providing an asymmetric operation mode in a rural carrier wireless communication system. In one mode, a method may assign a long code mask (LCM) to one of the plurality of forward * way carriers to transmit data from the base station or the access network to 113125.doc 1325247. The information channel is multiplexed to an access terminal and on a reverse link carrier. The information channel may include at least one of data source channel (DSC) information, data rate control (DRC) information, and response (ACK) information, and the multiplex may be code division multiplexing (CDM). The access network can indicate whether the access terminal multiplexes DSC information. In the case where the feedback from the access terminal travels to the same channel card and a servo sector is the same channel card between the plurality of forward link carriers, the access network may indicate the access terminal This method can further offset the ACK information on the reverse link to reduce the ratio of the reverse link peak to the average value. In another mode, a method may multiplex the information channel on a branch and a Q branch, and transmit the coded multiplexed information channel on the reverse link carrier. The DRC and ACK information may be overwritten using the Walsh codeword, and the DRC information may be further combined with the DRC overlay symbols offset by the Walsh code on both the "branch' branch and the Q-branch. Depending on the hardware, any combination of these modes can be supported. The first mode can achieve 15 forward link carriers and one reverse link carrier, wherein 丨5 unique long code masks are assigned to an access terminal. The first and second modes may also be combined to achieve 15 forward key carriers and one reverse link carrier, wherein 4 unique long code masks are assigned to an access terminal. [Embodiment] Any of the embodiments described herein are not necessarily better or more advantageous than the other embodiments. Although the various aspects of the disclosure are presented in the drawings, the drawings are not necessarily 113125.doc FIG. 1 illustrates a wireless communication system including a system controller 1, a base station (BS) 104a to UMb, and a plurality of access terminals (AT) 1〇6a to 1〇6h. . System 1 can have any number of controllers, base stations, and access terminals 1〇6. Various aspects and embodiments of the invention described hereinafter may be implemented in system 100. The access terminal 丨06 can be mobile or stationary and can be dispersed throughout the communication system 100 of the figure. The access terminal 1〇6 can be connected to or implemented in a computing device such as a laptop personal computer. Alternatively, the access terminal can be a self-contained data device such as a personal digital assistant (PDA) e-access terminal 106: refers to various types of devices such as wireline phones, wireless phones, cellular phones, laptops, wireless communication individuals Computer (PC) card, PDA, external or internal data machine [Access terminal can be any device that communicates to a user via a wireless channel or via a cable channel (eg, using fiber optic or coaxial cable) to provide data connectivity to the user. The access terminal can have various names such as a mobile station (MS), an access unit, a subscriber unit, a mobile device, a mobile terminal, an action list it, a mobile phone, a mobile object, a remote station, a remote terminal, a remote unit, use Devices, user equipment, handheld devices, etc. System 100 provides communication for a number of units, each of which is served by one or more base stations 104. Base station 104 may also be referred to as a base station transceiver system (BTS), an access point, an access network (AN), a data set field transceiver (MPT), or a Node B. The access network refers to a network device that provides data connectivity between the packet exchange network (e.g., the Internet) and the access terminal 106. 104 to Access Terminal The forward link (FL) or downlink refers to the transmission from the base station 113125.doc 1325247 106. The reverse link (RL) or uplink refers to the transmission from the access terminal 106 to the base station 104. The base station 104 can transmit data to the access terminal 106 using a data rate selected from one of a set of different data rates. The access terminal 106 can measure the signal to interference interference ratio (SINR) of the previous pilot transmitted by the base station 104 and determine a desired data rate for the base station 104 to transmit data to the access terminal 106. The access terminal 106 can send a data request channel or data rate control (DRC) message to the base station 104 to inform the base station 104 of the required data rate. System controller 1〇2 (also referred to as a base station controller (BSC)) can provide coordination and control of the base station 104 and can further control the path selection of calls to the access terminal 106 via the base station 104. The system controller 102 can be further coupled to the Public Switched Telephone Network (PSTN) via a Mobile Switching Center (MSC) and coupled to the packet data network via a Packet Data Service Node (PDSN). Communication system 100 may also be referred to as high data rate (HDR) using one or more communication technologies, such as code division multi-directional proximity (CDMA), IS-95, such as "cdma2000 High Rate Packet Data Air Interface Specification" High Rate Packet Data (HRPD), TIA/EIA/IS-856, CDMA lx Evolution Data Optimization (EV-DO), lxEV-DV, Wideband CDMA (W-CDMA), Global System for Mobile Communications (UMTS), Time division synchronous CDMA (TD-SCDMA), orthogonal frequency department multiplexing (OFDM), and the like. The examples described below provide details for a clear understanding. The concepts presented herein are also applicable to other systems, and the examples presented are not intended to limit the application.

(S 113125.doc Multi-Carrier System The "multi-carrier" system described herein can use frequency division multiplexing, where each ''carrier'' corresponds to a radio range. For example, a carrier can be 1.25. The megahertz wide's can also use other carrier sizes. The carrier can also be referred to as a CDMA carrier, link or CDMA channel. The demand for data streams can tend to be more cumbersome to use for the forward or reverse link. The description relates to a decoupling system 1 for forward link and reverse link assignment in a multi-carrier wireless communication system. One of the forward links (or carriers) can be assigned to the access terminal 1〇6 and Reverse link (or carrier), where 1^ and ^^ may not be equal. The following description illustrates a mechanism for reducing the additional channel transmission of the reverse link add-on. The base station, BSC or MSC may determine that it is assigned for The number of FL carriers that access the terminal. Depending on conditions such as channel conditions, available data for the terminal, terminal amplifier power headroom, and application flow conditions, the base station, Bsc, or MSC may also be assigned to access the access terminal. The number of FL carriers in the machine. The terminal 106 can execute applications such as internet applications, video conferencing, electric shirts, games, etc., which can use voice, video files, video clips, data files, etc. transmitted from the base station 104. Applications can include two types: 1 • Delay-tolerant, high forward link throughput, and low reverse link throughput; and 2. Delay-sensitive, low forward Link throughput and low reverse link throughput. Other types of applications may also exist. If the system uses multiple carriers on the forward link to achieve high throughput or I13125.doc -10. 1325247 To maximize efficiency, access terminal 1(6) avoids transmissions on all associated carriers on the reverse link to improve reverse link efficiency. For type 1 that accepts slower DRC updates. In this regard, the access terminal 106 can: a) transmit a continuous preamble on the primary reverse link carrier; b) transmit data only on the primary reverse link carrier; c) on the primary reverse link Each FL load transmitted over time-multiplexed on the carrier The DRC, which assumes slower DRC channel update is acceptable Shu and d) optionally transmit an acknowledgment of each FL carrier acknowledgment (ACK) or negative acknowledgment (NAK) message. When transmitting the ACK channel, the access terminal 1〇6 can transmit the gating preamble on the secondary carrier (on the same power level as the other on the primary RL carrier), for example, the edge of the slot around the ACK transmission is Used for warming up the pre-filter. For applications that may not accept a slower type of DRC update, the access terminal 106 may: a) continuously transmit to all reverse link carriers of the link carrier prior to being associated with the grant. The preamble signal; b) the data is transmitted only on the primary reverse link carrier; and c) the ACK for each FL carrier is transmitted as needed. For Type 2 applications, the Access Terminals 1〇6 can: a) transmit consecutive preambles on the primary reverse link carrier; b) transmit data only on the primary reverse link carrier; c) The DRC of each of the fl carriers transmitting the time division multiplex on the primary reverse link carrier is assumed to be an update of the slower DRC channel to be acceptable; and 113125.doc d) only on the primary reverse link carrier Transfer ACK on. The base station 104 can be constrained to ensure that no more than one packet is transmitted between all forward link carriers. The base station 104 can determine the ACK association based on the timing of the transmitted packets. Alternatively, the access terminal 1 can perform an alternative form of ACK channel transmission: a) if desired, for example, if the system 100 supports additional FL carriers (In the EV_D〇 system, the ACK can be transmitted in the % time slot), the ACK channel transmission time interval is reduced; b) the ACK channel transmission of the N forward link carriers in the single/z time slot; c) The ACK channel transmission interval is a function of the number of enabled forward link carriers; and d) the ACK channel transmission for RL and FL association settings can be 'via in the Medium Access Control (MAC) layer 1400 (FIG. 14) Implemented by signal transmission. There are two carrier assignment modes for the multi-carrier forward traffic channel mac: symmetric carrier assignment and asymmetric carrier assignment. Figure 2 illustrates an example of a symmetrical carrier assignment with three forward link carriers 2 〇〇 "2 〇〇 c (for example, for EV-DO data) and three corresponding reverse link carriers" η to real symmetrical carrier assignments . The _-type carrier finger can be used for: (4) applications with symmetrical data rate requirements; and / (10)) applications with asymmetric data rate requirements that enhance hardware support for tendon insertion. 3A and 3B illustrate the implementation of an asymmetric carrier assignment from the display of three forward link carriers to a corresponding reverse link carrier 113l25.doc -12· 1325247 302. Figure 3B shows three forward link carriers 300A through 300C and two corresponding reverse link carriers 304A and 304B. Asymmetric carrier assignments can be used for applications with asymmetric data rate requirements, such as File Transfer Protocol (FTP) downloads. An asymmetric carrier assignment may have (a) a reduced reverse link add-on channel and (b) a MAC channel that allows forward link traffic (FLT) carrier assignment and reverse power control (RPC) carrier assignment Phase separation.

The asymmetric forward and reverse link assignments a multi-carrier DRC access terminal 106 can time-multiplex multiple DRC channel transmissions of the forward link carrier on a single reverse link carrier. Figure 14 illustrates a time division multiplexer 1402 for multiplexing DCR information in the access terminal 106 of Figure 1. The MAC layer 1400 (Fig. 14) in the access terminal 106 can provide the association of the DRC with the forward link based on the DRC transmission time. The number of forward link carriers for which the DRC transmission is indicated by a single reverse link carrier may depend on: (i) the largest acceptable DRC span, which is all assigned The time interval required for the transmission of the DRC to the link carrier, such as DRC span = maximum (16 time slots, DRC length (per carrier) χ carrier number); and (Π) by such as lxEV-DORev Α The number of carriers supported by the channel card hardware. In one embodiment, four FL carriers are associated with a single RL carrier that can be limited by the transmission of ACKs for the four FL carriers. In another embodiment, the access terminal 106 can use a single DRC channel between all carriers. In other words, access terminal 106 transmits a single DRC for all designated FL carriers to base station 104 to transmit data to the access terminal 106 at the designated DRC rate.

113125.doc -13 - 1325247 In another embodiment, access terminal 106 can use (a) a single DRC channel between multiple carriers (the same DRC is used for some of the FL carriers of all FL carriers) with ( b) A combination of time-division multiplexed DRC channels. Figure 4A illustrates an example of a DRC reverse link transmission (DRC length = 8 time slots) requesting a data transmission rate for a single forward link carrier for use. 4B through 4F illustrate examples of multi-carrier, ie, time-division multiplexed DRC. In particular, Figure 4B shows two DRCs for two forward link carriers transmitted on a single reverse link carrier (each DRC length = 4 time slots; DRC span = 8 time slots) An example. Figure 4C shows an example of four DRCs for four forward link carriers (each DRC length = 2 time slots; DRC span = 8 time slots) transmitted on a single reverse link carrier. Figure 4D illustrates an example of two interleaved DRCs for each two forward link carriers (each DRC length = 4 time slots; DRC span = 8 time slots) transmitted on a single reverse link carrier. Interleaved DRC channel transmissions can provide additional time diversity for a given DRC length. Figure 4E shows an example of four interleaved DRCs for each four forward link carriers (each DRC length = 4 time slots; DRC span = 16 time slots) transmitted on a single reverse link carrier. Figure 4F shows an example of four interleaved DRCs for four forward link carriers (each DRC length = 2 time slots; DRC span = 8 time slots) transmitted on a single reverse link carrier.

Asymmetric forward and reverse links assign a multi-carrier ACK. In an embodiment or multi-carrier communication mode of operation, when the number of current link channels is greater than the number of reverse link channels, and a plurality of forward chains The DSC, DRC, and ACK channels associated with the channel can be multiplexed to a single reverse chain <S) 113125.doc -14 - 1325247 on the carrier. In this embodiment or mode, a long code mask (L(:M) may be used for this multiplex. According to this embodiment or mode, the AN may indicate whether the AT will multiplex the DSC. The feedback from the AT proceeds to In the case of the same channel card and a servo sector being the same channel card between multiple forward link carriers, the AT can indicate that the AT does not use the multiplexed DSC. In detail, a unique long code mask can be used. Transmitting the DRC and ACK channels for the secondary forward link carrier. Referring to Figure 5, it is shown that a separate long code mask can be used for transmission on a primary reverse link for

A block diagram of a module that attaches the DRC and ACK channels of the forward link carrier. Therefore, the ratio of the reverse link peak to the average can be reduced by using the offset ACK channel.

Referring to Figure 6, a reduction in the ratio of peak to average in a non-symmetric mode of operation using, for example, more than one long code mask is illustrated. In particular, the channel can be transmitted on the per-AT opposite to each carrier. Because the reduction in the ratio of the reverse link peak to the average value can be adversely affected by the ACK channel transmission for the secondary forward link carrier (eg, multiple ACK channels can become overlapping on the power-time slot map) 'So the Dsc channel can be used to transmit the half-time slot for the ACK channel transmission of the secondary forward-keyway carrier, thereby shifting the ACK channel transmission as shown in FIG. Therefore, for a certain fragment of the assigned forward link carrier, the multi-bit AT can be reduced before the decoding time. The reduction in the ratio of the peak of the reverse link to the average is illustrated in Figure 7a to Figure 2. More specifically, as explained below with reference to Figure 7E, the access terminal H) 6 can divide the ACK channel transmission of multiple forward carriers on the single-reverse link carrier. Figure 14 illustrates a time-sharing multiplexer 14〇4 for ACK information in the multiplexer 106. 'Mouth 113125.doc _ 15· 1325247 ACK channel transmission per carrier can be reduced from 1 time slot to 1/4 time slot (each ack transmission lasts % time slot) (instead of 1 used in EV-DO Rev. A) /2 time slot), which may depend on the number of FL carriers that the ACK channel is transmitted for. The MAC layer 14 〇〇 (Fig. 14) at the access terminal 1 可 6 can provide an association of the ACK with the forward link based on the ACK transmission time. 7A and 7B show two DRC channel transmission requests of two forward link carriers (carriers i and 2) transmitted from the access terminal 1〇6 to the base station 1〇4, in two different ways. An instance of the FL data is transmitted at a rate (eg, U3.6 and 307.2 kbps). 7A and 7B may illustrate a DRC decoded by a base station 1-4, but FIGS. 7A and 7B do not indicate a method for time division multiplexed DRC on a single reverse link carrier as illustrated in FIG. 4B to FIG. . In Figures 7C and 7D, the base station 1.4 transmits to the two forward link carriers at two different rates (e.g., 153 6 and 3 〇 7 2 kbps) in response to the DRC. The forward traffic channel ( FTC) sub-package. The base station 1 4 can repeat and process the data bits of a raw data packet into a plurality of corresponding "sub-packets" for transmission to the access terminal 106. If the access terminal 106 is subjected to a high signal-to-noise signal, the first sub-packet may contain sufficient information for accessing the terminal 1 and deriving the original data packet. If the terminal 106 is subjected to a fading or low signal to interference signal, the access terminal 106 can have a relatively low probability of correctly decoding and deriving the original data packet only from the first sub-packet. If the access terminal 1〇6 does not successfully decode the first sub-packet, the access terminal transmits a NAK to the base station 104. The base station ι〇4 then sends the second sub-package. The access terminal 1G6 can combine the information originating from the first and second sub-packets to attempt to decode the original data packet at 113125.doc -16· 1325247. Since the access terminal (10) receives more sub-blocks = and, and β derives information from the parent-received sub-packets, the probability of decoding and deriving the original data packets is increased. In Fig. 7C, the base station 1G4 transmits the first sub-packet of the original data packet to the access terminal _ in the slot 1 of the carrier 1. At the same time in (10), the base

σ 104 transmits the first sub-packet of another original data packet to the access terminal 1〇6 at the time slot of carrier 2. Access terminal 106 attempts to decode two original data packets from the first sub-packet received on the carrier, respectively. In FIG. 7, the access terminal 106 cannot correctly decode the received first data packet on the carrier i; send a NAK to the base station 104 on the ACK channel; the received signal on the carrier 1 cannot be correctly decoded. a second sub-packet; transmitting a NAK to the base station ι 4 on the ACK channel; the third sub-packet received on the carrier 1 cannot be correctly decoded, and a NAK is sent to the base station 1 〇4 on the ACK channel; Breaking the fourth sub-packet received on carrier 1; and transmitting an ACK to base station 104 on the ACK channel. Also in Figure 7E, the access terminal 106 is unable to correctly decode the received first and second sub-packets on the carrier 2 and transmits the NAK to the base station 1〇4. The access terminal 106 correctly decodes the original second packet after receiving and processing the third sub-packet on slot 3 of carrier 2 (e.g., using a cyclic redundancy check (CRC) or other error detection technique). Access terminal 106 transmits an acknowledgement (ACK) signal to base station 1〇4 so that it does not transmit a fourth sub-packet for the second original packet on carrier 2. The base station 104 can then transmit the first sub-packet of the next 113125.doc -17- 1325247 packet in slot 1 (n + 12) of carrier 2. In Figure 7E, access terminal 106 transmits ACK and NAK for two FL carriers on a single ACK/NAK RL channel (1/2 time slot ACK/NAK channel with 1/4 time slot per FL carrier) transmission). In another embodiment of multi-carrier ACK, access terminal 106 can use a single RL ACK channel, where RL ACK is associated with FL based on the timing of packet reception (also referred to as ACK channel association based on transmission time). This can be used for Voice over Internet Protocol (VoIP) services. The ACK channel association based on transmission time may add a constraint on the FL scheduler to limit the transmission to a given access terminal 106 on a single FL carrier each time.

Enhanced Multi-Carrier ACK In another embodiment of a multi-carrier asymmetric mode of operation, Figures 8 and 9 illustrate the process and structure of multi-carrier ACK and overlay transmission. According to this mode, each long code mask can have 4 ACK channels for 4 forward link carriers, for example, to use code division multiplexing (CDM) transmission on the I branch and the Q branch in a single inverse The ACK is transmitted on the link carrier. Different Walsh covers can be used (for example) to make the I branch orthogonal to the Q branch. In particular, Figure 8 shows the process and structure for preparing a multi-carrier ACK transmission. The first and second ACK signal mapping blocks 800 and 802 map or encode ACK channel carriers 1 and 2, respectively (1 bit per time slot). Subsequent symbol repeat blocks 804 and 806 repeat a plurality of symbols for each half time slot. Following the repetition, the symbols are channelized by Walsh code/overlay and < respectively at Walsh coverage blocks 808 and 810, resulting in 32 binary symbols per half-time slot. A gain is then applied to each of the half-time slots at ACK Channel Gain blocks 812 and 814. At 816 < s) 113125.doc • 18·, and the gain of the α half-time slot' and then the multiplier 818 applies the A-cover/program code %f to indicate the ACK channel for the I phase. Similar to FIG. 8, FIG. 9 illustrates the process and structure of multi-carrier ACK and overlay transmission for ACK channel carriers 3 and 4, and the first and fourth analog signal mapping blocks 900 and 902 respectively map or encode ACK channel carriers 3 and 4, respectively. (1 bit per slot). [^ After the symbol repeating blocks 9〇4 and 9〇6, each half-time slot repeats a plurality of symbols. Following the repetition, the symbols are channelized by Walsh code/cover 吖 and 分别 at 〇"虬 coverage blocks 9〇8 and 91〇, respectively, resulting in 32 binary symbols for each half-time slot. Then on the ACK channel A gain is applied to each of the half-time slots at gain blocks 912 and 914. The benefits of the half-time slots are combined at 916, and then the multiplier 918 applies Walsh coverage/code %丨2 to indicate the ACK for the Q phase. In another embodiment of the multi-carrier asymmetric mode of operation, the figure illustrates the process and structure for preparing the enhanced multi-carrier Drc channel for transmission. In this mode, each long code mask There may be 4 feet (^ channels (one for each of the key carriers), for example to transmit DRC rates on a single reverse link carrier using coded multiplex transmission on the J and Q branches. For a DRC transmission using the same codeword Walsh coverage, the DRC coverage value of one forward carrier may be offset with respect to the DRC coverage value of another forward carrier, such that the DRC coverage is clear. For example, if Carrier # 1 uses drc coverage = 0x1 ' then carrier # 3 The DRC coverage value offset relative to Οχι can be used. More specifically, 'see FIG. 10, the first and second bi-orthogonal encoders 1 and 1002 respectively encode the drc of each of carriers 1 and 2, respectively. Channel (for example, a 4-bit symbol for each active time slot), and each active time slot produces 8 binary 113125.doc • 19· 1325247 symbols. Each of the code words Walsh is covered in coverage block 1004 and %2 of the 1006 and the town, then each active time slot generates 二进制6 binary symbols. Then the first and second signal point mapping blocks 1008 and 1〇1 map 〇s and Is to each active time respectively + 1 and _ 槽 of the slot. After the benefits are applied to each of the time slots at the drc channel gain blocks 1012 and 1014, the multipliers 1020 and 1022 then use the outputs of the gains 1 〇 12 and 1 〇 14 respectively. The DRC coverage symbols of carrier 1 and carrier 2 (e.g., one 3-bit symbol per active time slot) are separately combined. In another embodiment of the asymmetric mode of operation of multiple carriers, the DRC coverage symbols for carriers i and 2 are used. Was covered by Walsh coverage blocks (β (z.= 0,1,...7)) 1016 and 1018 respectively. Then, the outputs of the multipliers 1020 and 1022 are added at 1 〇 24, and then a Walsh cover code is applied at 1 〇 26 for multiplication ' to indicate the DRC channel for the Q phase. Similar to FIG. 10' 11 illustrates a process and structure for preparing an enhanced multi-carrier DRC channel for transmission of carriers 3 and 4. The third and fourth dual orthogonal encoders 1100 and 1102 respectively encode DRCs for each of carriers 3 and 4. The channel (for example, a 4-bit symbol for each active time slot), and each active time slot produces 8 binary symbols. Each of the codewords Walsh covers 吣 and 分别 in codeword coverage blocks 1104 and 1106, respectively, and then each active time slot produces 16 binary symbols. Then, the first and second signal point mapping blocks 11 〇 8 and 111 〇 do not map Os and Is to +1 and · ι of each active time slot. After applying gain to each of the time slots at drc channel gain Q blocks 1112 and 1114, then multipliers 1120 and 1122 then combine the outputs of gains 1Π2 and 1114 with DRC overlay symbols for carrier 3 and carrier 4, respectively (eg Each of the active time slots is a combination of a 3-bit <S) 113125.doc -20- 1325247 symbol). In another embodiment of the asymmetric mode of operation of the evening carrier, the 'DRC coverage symbols for carriers 3 and 4 are covered by Walsh at coverage blocks 1116 and 1118, respectively (%8 (ζ· = 〇, 1, .··7)) Channelization. The outputs of multipliers 1120 and 1122 are then summed at 丨丨24, and then |31 虬 cover code % is applied at 1126 for multiplication' to indicate the Drc channel for the j-phase. It will be appreciated that in any of the above embodiments of the asymmetric mode of operation of multiple carriers, 'transfers over the I-branch and Q-branch using a code division multiplexing transmission on a single reverse-keyway carrier for up to four (" 4) ack and DRC channels of a forward link carrier. In the case where the number of forward link and reverse link channels are equal, the 'description mechanism may also allow the AT to autonomously turn off the preamble and traffic channel on certain reverse link frequencies', in the reverse key. The AT selection on the path frequency is not transmitted (for example, when the AT lacks the transmission power margin). In addition, for DRC transmissions that use the same codeword Walsh coverage, the DRC coverage value of one forward carrier can be offset relative to the drc coverage value of the other forward bond carrier. Stated another way, according to this aspect of the invention, the I/Q phase (in-phase (1), quadrature (Q)) and W (16, 8) I/Q of the Walsh code W (16, 8) can be used. The ACK and DRC channels for the first 4 carriers are transmitted in phase. If additional DRC channel transmissions are required for the additional FL carrier, then the access terminal 1 〇6 can use the % time slot DRC on each of the W (16, 8) phases. Thus, access terminal 106 can support DRC for up to four FL carriers with a single RL carrier. Referring to Figure 12', there is shown the correspondence between the forward link and reverse link frequencies in a multi-carrier system. The Traffic Channel Assignment (TCA) can specify this relationship. By way of example, the reverse link frequency "X" is designated to carry the DSC, DRC, and ACK channels for all forward chain 113125.doc -21 · 1325247 frequencies. In one aspect of the invention 'for each reverse link frequency, four (4) most significant bits (MSBs) of the long code mask can be used to generate a plurality (eg, up to four) of additional lengths. Code mask. In detail, the 4-bit identifier that can be specified in Tca (for example, <Long Ma Mask Index (2 bits), Feedback ^Heart Coverage (1 bit), IQ Identifier (1 bit)&gt ;) Channels that can send feedback (ACK/DRC). In another aspect, the AT can set the long code masks (e.g., MIrtcmac and MQrtcmac) for the reverse traffic channel as follows. For example, the 42-bit code mask MIRTCMAC associated with each long code mask index can be specified as shown in the following table:

Bit 3 ( ro r 3, i > no ^ ϊ Γ > - ς > ro r» r no γ· > no r» MlfiTOWC V 1 1 1 1 1 1 1 1 罝 escape code [AU AN can be One or more long code masks are assigned to the AT on each of the channels over which the AT can transmit. For example, a long code mask index that can be used as a public data material of a routing update protocol (R〇ute Update Proto col) The value of the long code mask to identify each of the channels. In Table I, the replacement code (ATILCM) can be defined as follows: ATILCm = (A31, A3〇, A29, ..., A〇) Replacement code (ATIlcm )=(A., A31, A22, A13, A4, A26, A17, A8, A3., A21, a12, a3, a25> a16, a7, a29, a2〇, a,,, a2, a24j a15, a6 , A28, A19, A10, Ai, A23, Al4, A5, A27, Ai8, A9) 0 42-bit code mask MQRTCMAC can be derived from the code mask MIrtcmac as follows: < s > 113125.doc -22- 1325247 MQRTCMAC[k] = MIRTcMAC[kl], where k = 1,...,41 MQrtcmac[〇] = MIrtcmac[〇] 十 MIrtcmac[1]十 MIrtcmac[2] 十 MIrTcmac[4]十 MIrtcmac[5]十 MIrtcmac[ 6] Θ MIrtcmac [9] ten MIrtcmac [15] ten MIrtcmac [16] ten MIrtcmac [17] ten MIrtcmac [18] Ten MIrtcmac [20] ten MIRTCMAc [21] Θ MIrTcmac [24] ten MIrtcmac [25] ten MIrtcmac [26] ten MIrtcmac [30] ten MIRTCMAc [32] ten MIrtcmac [34] ten MIrtcmac [41] where ten refers to each other斥 运 运 且 and MQrtcmac[z·] and MIrtcmac[z·] respectively represent the i-th least significant bit of MQrtcmac and MIRTcmac. The forward-key soft-combining mode access terminal 106 can be used with Multi-carrier DRC in forward link soft combining mode (soft combining data received over multiple FL carriers). In this mode, base station 1〇4 does not have to transmit packets simultaneously on individual forward links, ie, the design will Support for soft handoff across carriers with asynchronous transmission. The access terminal 106 can indicate the DRC index based on the transmission of the same base station 104 to the access terminal 106 in a given timing slot on the plurality of FL carriers. In one embodiment, the system or network 100 may use the General Attribute Update Protocol (GAUP) to indicate that all packet transmissions to a given terminal 106 will be multi-carrier transmissions for a period of time. Access terminal 106 can transmit the DRC based on the combined SINR prediction until an additional command is received. The MAC layer 1400 (Fig. 14) provides signal mapping. 113125.doc -23- 网路 The network may have some flexibility to provide access to the access terminal 1〇6 using a combination of carriers or carriers during the same time interval. This may use an individual DRC for each carrier and a DRC »network configurable access terminal 106 based on the combined SINr prediction to operate in the two modes of the DRC report (eg, when) The forward link soft combining mode can be used when the access terminal 1 6 is subjected to bad channel conditions for a VoIP stream or all types of streams.

Figure 13 A illustrates the figure available! An example of a forward link transmission chain, structure or process implemented at base station 1〇4. The functions and components shown in Figure 13A can be implemented by software, hardware, or a combination of software and hardware. Other functions in addition to or in lieu of the functions shown in Fig. UA may be added to Fig. 13A.

In block 1302, the encoder encodes the data bits using one or more encoding mechanisms to provide encoded data chips. Each coding mechanism may include one or more types of coding, such as cyclic redundancy check (CRC), convolutional coding, turbo coding, block coding, other types of coding, or no coding at all. Other coding mechanisms may include automatic repeat request, hybrid ARQ, and incremental redundancy repetition techniques. Different types of data can be encoded using different coding mechanisms. In block 1304, the interleaver interleaves the encoded data bits to resist fading. In block 1306, the modulator modulates the encoded, interleaved data to produce modulated data. Examples of modulation techniques include binary phase shift keying (BPSK) and quadrature phase shift keying (qpsk). In block 1308, the repeater may repeat the order of the modulated data 113125.doc -24· column' or the symbol puncturing unit punctable symbol. In block 1310, an extender (e.g., a 'multiplier) may use Walsh coverage (i.e., Walsh code) to extend the modulated data' to form a data chip. In block 1312, the multiplexer can time-sequence the multi-tool with the preamble chip and the data chip of the MAC chip to form a chip stream. In block 13 14 , the pseudo-random noise (PN) expander may spread the chip stream with one or more pn codes (e.g., short code, long code). Subsequently, the forward link modulated signal (transmitted chip) is transmitted over the wireless communication link via the antenna to one or more access terminals 1〇6. Figure 13B illustrates an example of a forward link receive chain, process or structure that may be implemented at access terminal 1 〇 6 of Figure 1. The functions and components shown in Figure 3B can be implemented by software, hardware or a combination of software and hardware. Other functions in addition to or in place of the functions shown in Fig. 13B may be added to Fig. 3b. One or more antennas 1320A through 1320B receive forward link modulated signals from one or more base stations 104. Multiple antennas 132 to 132 〇b provide spatial diversity that prevents unfavorable path effects such as fading. Each received signal is provided to an individual antenna receiver filter block 322 that adjusts (eg, 'chopping, amplifying, downconverting, and digitizing the received signal to generate a data sample of the received signal . A Cascaded adaptive linear equaliZer 1324 receives the data samples and produces an equalized slice to block 1325. Block 1325 can use the one or more pn codes to despread the samples in block 1314. Block 1326 can remove the lead time lag and insert a blank. In block 1328, the 'de-spreader can solve Walsh, meaning to despread or remove the origin from the same spreading sequence used to extend the data in block 1310 at the base 113125.doc -25- Walsh Code of Received Data Samples In block 1330, the demodulator demodulates the data samples of all received signals to provide recovered symbols. For cdma2000, demodulation attempts to recover data transmission by: (1) channelizing the despread samples to isolate or channel the received data and preambles onto their respective code channels' and (2) Using the recovered preamble to consistently demodulate the channelized data to provide demodulated data. Demodulation block 1330 can implement a rake receiver to handle multiple signal conditions. Block 1334 can receive the position of the punctured symbol and convert the symbol to a contiguous bit. Block 1332 may zero the log likelihood ratio (LLR) when the punctured bit occurs. Block 1336 can apply channel deinterlacing. In block 1338, the channel decoder decodes the demodulated data to recover the decoded data bits transmitted by base station 104. The term "information channel" as disclosed herein may refer to a DRC channel, an ACK channel, or other channel containing channel state information. It will be appreciated that the embodiments described herein provide certain embodiments of the asymmetric mode of operation of a multi-carrier communication system. There are other embodiments and implementations. The various disclosed embodiments can be implemented in AN, AT, and other components in a multi-carrier communication system. Those skilled in the art will appreciate that information and signals can be represented using any of a variety of different technologies and techniques. For example, the materials, instructions, commands, information, signals, bits, symbols, and slices referred to in the above description may be voltage, current, electromagnetic wave, magnetic field or magnetic particle, light field or light particle 113125.doc -26 - Or any combination thereof. It will be further appreciated by those skilled in the art that the various illustrative logical blocks, modules, circuits, and algorithm steps associated with the embodiments disclosed herein can be implemented as an electronic hardware, a computer software, or a combination of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether this functionality is implemented as hardware or software depends on the particular application and the design constraints imposed on the overall system. The person skilled in the art can implement the described functionality in various ways for each particular application, but this implementation decision should not be construed as causing a departure from the scope of the invention. The various illustrative logical blocks, modules, and circuits described in association with the embodiments disclosed herein can be implemented or executed using the general-purpose processor, digital signal processor (DSP), special application complex. An electrical circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of the foregoing designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor can also be implemented as a combination of computing devices' such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration. The steps of a method or algorithm described in association with the embodiments disclosed herein may be embodied in a hardware, in a software module executed by a processor, or in a combination of both. The software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, ll3125.doc • 27·I, hard disk, removable disk, CD_譲 or any Other forms of storage media. The storage medium is coupled to the location " and the processing 15 can retrieve information from the storage medium and write information to the storage medium. In an alternative scenario, the media can be integrated into the processor. The processor and the health media can reside in the ASIC. The ASIC can reside in the user terminal. In the alternative, the processor and storage medium may reside as discrete components in the user terminal. Headings are included in this article for reference and assistance in locating certain sections. These headings are not intended to limit the material described below, and may be applicable in other sections of the specification. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to the embodiments will be apparent to those skilled in the art, and the invention may be applied to other embodiments without departing from the spirit of the invention or (d). Therefore, it is not intended that the present invention be limited to the embodiments disclosed herein, and that it is in the broadest scope consistent with the principles of the present invention and the novel features. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 illustrates a wireless communication system having a base station and an access terminal. Figure 2 illustrates an example of symmetric forward link and reverse link carrier assignment. 3A and 3B illustrate an example of asymmetric carrier assignment. Figure 4A illustrates an example of data rate control (7) rc) reverse link transmission for a single u-way link carrier. 4B through 4F illustrate examples of multi-carrier, ie, time-multiplexed drc. Figure 5 illustrates a block diagram of a module for transmitting DRC and ACK channels for additional forward link (FL) carriers using a separate long code mask on a primary reverse link (RL) upload 113125.doc • 28· 1325247 Figure ό illustrates the reduction in the ratio of peak to average in the asymmetric mode of operation and long code masking. Figure 7A and Figure 7B illustrate an example of an access terminal that transmits two DRC channel transmission requests for two forward link carriers to a base station to transmit data at two different rates. Figures 7C and 7D illustrate a base station transmitting forward traffic channel sub-packets at two different rates on two forward link carriers. Figure 7A illustrates an access terminal that transmits an acknowledgment (ACK) and a negative acknowledgment (ΝΑΚ) for two forward link carriers on a single reverse link channel. 8 and 9 illustrate the process and structure of the asymmetric mode of multicarrier ACK transmission. 10 and 11 illustrate the process and structure of an asymmetric mode of multi-carrier DRC transmission. Figure 12 illustrates the correspondence between the forward link and reverse link frequencies in a multi-carrier system. Figure 13 illustrates an example of a forward link transmission chain, structure or process that may be implemented at the base station of Figure 1. Figure 13B illustrates an example of a receive key, process or structure that can be forwarded to the link at the access terminal of Figure 1. Figure 14 illustrates certain components of the access terminal of Figure 1. [Main component symbol description] 100 wireless communication system

< S U3125.doc • 29· 1325247 102 system controller 104a, 104b base station 106, 106a, 106b, 106c '106d, 106e, 106f, 106g 200A, 200B, 202A, 202B, 300A, 300B,

302 304A, 304B 800 802 804 806 808

812 814 818 900 902 904 906 113125.doc Access terminal 200C forward link carrier 202C reverse link carrier 300C forward link carrier reverse link carrier reverse link carrier ACK signal mapping block ACK signal mapping Block symbol repeat block symbol repeat block Walsh cover block Walsh cover block ACK channel gain block ACK channel gain block multiplier ACK signal map block ACK signal map block symbol repeat block symbol repeat block Walsh cover Block -30- 908 1325247 910 Walsh Cover Block 912 ACK Channel Gain Block 914 ACK Channel Gain Block 918 Multiplier 1000 Bi-orthogonal Encoder 1002 Bi-orthogonal Encoder 1004 Cover Block 1006 Cover Block 1008 Signal Point Mapping block 1010 signal point mapping block 1012 DRC channel gain block 1014 DRC channel gain block 1016 Walsh coverage block 1018 Walsh coverage block 1020 multiplier 1022 multiplier 1100 bi-orthogonal encoder 1102 bi-orthogonal encoder 1104 Codeword coverage block 1106 codeword coverage block 1108 signal point mapping block 1110 signal point mapping block 1112 DRC channel gain Block 1114 DRC channel gain blocks 113125.doc -31 - 1325247

1116 Coverage Block 1118 Coverage Block 1120 Multiplier 1122 Multiplier 1302 Block 1304 Block 1306 Block 1308 Block 1310 Block 13 12 Block 1314 Block 1320A, 1320B Antenna 1324 Cascade Adapted to Linear Equalizer 1325 Area Block 1326 Block 1328 Block 1330 Demodulation Transform Block 1332 Block 1334 Block 1336 Block 1338 Block 1400 MAC Layer 1402 Time Division Multiplexer 1404 Time Division Multiplexer 113125.doc • 32-

Claims (1)

1325247 Patent Application No. 095126549 Replacement of Chinese Patent Application (December 98) ' X. Patent Application Range: 1 · A method of asymmetric operation mode, comprising: assigning a long code mask (LCM) to the association The information channel of the plurality of forward link carriers transmits data from a base station or access network to an access terminal; and multiplexes the information channel on a reverse link carrier. 2. The method of claim 1 wherein the information channel comprises at least one of data source channel (DSC) information, data rate control (DRC) information, and response (ACK) information. 3. The method of claim 2, which further comprises offsetting the ACK information on the reverse link to reduce the ratio of the reverse link peak to the average. 4. The method of claim 2, further comprising indicating whether the access terminal multiplexes the DSC information based on feedback from the access terminal. 5. The method of claim 1, wherein the multiplex is code division multiplexing (CDM). The method of claim 5, further comprising calling the multiplexed information channel on an I branch and a Q branch. 7) The method of claim 5, wherein the information channel includes data rate control (DRC) information on both the I branch and the Q branch. 8. The method of claim 5 wherein the information channel includes acknowledgment (ACK) information on both the I branch and the q/knife. 9. The method of claim 5, further comprising uploading the coded multiplexed information channel on the reverse link carrier. 1 0 · A method of 5 眚 τ5 ^ π π term 7 further comprising overwriting the data rate control (DRC) information using a Walsh codeword. 113125-981215.doc The method of long term 8, further comprising overwriting the acknowledgment (ACK) information using a Walsh codeword. The method of claim 7, further comprising combining the data rate control (DRC) information and data rate control (DRC) coverage symbols on both the I branch and the Q branch. 13. The method of claim 12, wherein the data rate control (DRC) coverage symbols are channelized by offsetting the Walsh code. - A system of asymmetric operating modes, comprising: a controller adapted to: assign a long code mask (LCM) to a resource channel associated with a plurality of forward link carriers to be derived from a base The data of the station or access network is transmitted to an access terminal; and the access terminal is adapted to multiplex the information channel on a reverse link carrier. 15. The system of claim 14 wherein the controller is in the base station. 16. The system of claim 14, wherein the controller is in a base station controller or the access network. 17. The system of claim 14, wherein the information channel comprises at least one of data source channel (DSC) information, data rate control (DRC) information, and response (ACK) information. 18. The system of claim 17 wherein the access terminal is adapted to offset the ACK information on the reverse key to reduce the ratio of the reverse key peak average. 19. If the system of claims is 'where the multiplex is a code division multiplex. 113125-981215.doc 20. ^#7City repair (poor) is replacing page I 1 _ —----- - . - _ I - 21. 22. 23. 24. 25. 26. 27. 28. The system of claim 19, wherein the access terminal is adapted to transmit the coded multiplexed information channel on the reverse link carrier. A system of claim 17, wherein the access network is adapted to indicate whether the access terminal multiplexes the DSC information based on feedback from the access terminal. An access terminal comprising: a receiver receiving, from a base station, data on a long code mask (LCM) of a plurality of information channels associated with a plurality of forward link carriers; The reverse link carrier transmits data to the base station, and the evening component is configured to multiplex the information channel on the reverse link carrier. An access terminal as claimed in claim 22, wherein the multiplex component comprises means for code division multiplexing (CDM). The access terminal of claim 22, further comprising means for multiplexing the information channel on a branch and a Q branch. The access terminal of claim 24, wherein the information channel includes data rate control (DRC) information on both the branch and the Q branch. The access terminal of claim 24 wherein the information channel includes acknowledgment (ACK) information on both the branch and the Q branch. The access terminal of claim 22, further comprising means for transmitting the coded multiplexed information channel on the reverse link carrier. The access terminal of claim 25, further comprising means for overwriting the data rate control (DRC) information using a Walsh codeword. 113125-981215.doc 1325247 29. The access terminal of claim 26, further comprising means for overwriting the acknowledgment (ACK) information using the codeword. 30. The access terminal of claim 25, further comprising means for combining the data rate control (DRC) information and data rate control (DRC) coverage symbols on both the branch and the Q branch. 31. The access terminal of claim 30, wherein the data rate control (drc) coverage symbols are channelized by offsetting a Walsh code. 32. A computer readable storage medium comprising a code that, when executed by a hacker, causes the processor to perform a number of operations for multi-carrier communication, the code comprising: for processing in association with a plurality of a code of data received from a base station on a long code mask (LCM) of one of the information channels of the forward link carrier; for processing data transmitted on a reverse link carrier to the base station a code for processing the code of the information channel on the reverse link carrier. 33. The computer readable storage medium of claim 32, wherein the multi-engineering code comprises a code for code division multiplexing (CDM). 34. The computer readable storage medium of claim 32, further comprising code for code division multiplexing (CDM) of the information channel to an I branch and a q branch. 113125-981215.doc 1325247 Patent application No. 95126549 Chinese pattern replacement page (January 96) ape_ = molybium ifliliDDia®#A@} 8=3⁄4 one oHa 疠蒙3g耱^ Inch awake.«#852 ,^«*«** r·· ΐ_ί J ui_br^ ">·,***! 'Ul! Tt year supplement 1113⁄43⁄4li ^•^lr ••••I 1|Team Ms'H§§ 0§ log class #8_<=趔1-3§ I — 8P0 = molybdenum s?lili3Ha ffi#e@>oo=靼溆:}osG Ill Mite ω 寸 Χ 匪 匪 β; 11;, 113125-fig.doc